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Jung Lee, Mi,Ik Lee, Jong,Garcia, Daniel,Moutte, Jaques,Terry Williams, C.,Wall, Frances,Kim, Yeadong Geochemical Society of Japan] 2006 Geochemical journal Vol.40 No.1
<P>The phoscorite-carbonatite complex in the Sokli alkaline-carbonatite massif, northern Finland, comprises five stages of intrusions of phoscorites and carbonatites (P1-C1, P2-C2 and P3-C3 for phoscorites and calcite carbonatites;D4 and D5 for dolomite carbonatites). The phoscorites and calcite carbonatites at Sokli usually occur as pairs with the same mineral assemblages. Pyrochlore is found in the majority of rock types in the Sokli phoscorite-carbonatite complex, shows wide compositional variation and seems to preserve evolution trends of host rocks. Crystallization of pyrochlore begins from the P2-C2 phoscorite and calcite carbonatite and continues up to the latest D5 dolomite carbonatite. Pyrochlore in the early stage P2-C2 rocks has high U and Ta contents. These elements suddenly decrease from the P3-C3 rocks, on the other hand, Th and Ce contents increase. The compositions of the late generations from the D4 and D5 rocks are close to that of an ideal end-member pyrochlore with formula <TEX>$(Ca,Na)_2Nb_2O_6$</TEX> F. The Nb/Ta ratio and F content of pyrochlore increase from P2-C2 to the latest D5 dolomite carbonatite. The composition and evolutionary history of pyrochlore from the phoscorites are distinguished from those of the associated calcite carbonatites. Pyrochlore from the calcite carbonatites shows larger A-cation deficiencies compared to those from the paired phoscorites. Ta and Zr contents are slightly higher in pyrochlore from the calcite carbonatites, whereas Ti is generally higher in pyrochlore from the associated phoscorites. Moreover, pyrochlore from the phoscorites always shows a longer and more complex crystallization history compared to that of the same stage carbonatites. This indicates that the chemical condition was clearly different in the two systems during the crystallization of pyrochlore. Based on these results, together with the previous mineralogical and geochemical studies on the Sokli phoscorite-carbonatite complex, we propose a liquid immiscibility process as the most possible seg-regation mechanism of the two associated rocks. The composition of pyrochlore in the late dolomite carbonatites is dis-tinct and always lies on the evolutional trend of the earlier varieties. This implies that the dolomite carbonatites are the final magmatic products of the Sokli phoscorite-carbonatite system.</P>
CASE REPORT : A Case of Pulmonary Artery Sarcoma Presented as Cavitary Pulmonary Lesions
( Daniel Min ),( Ji Hyun Lee ),( Hye Cheol Jeong ),( Jung Hyun Kim ),( Suk Pyo Shin ),( Hong Min Kim ),( Kyu Hyun Han ),( Hye Yun Jeong ),( Eun Kyung Kim ) 대한결핵 및 호흡기학회 2014 Tuberculosis and Respiratory Diseases Vol.76 No.3
Pulmonary artery sarcoma (PAS) is a rare, poorly differentiated malignancy arising from the intimal layer of the pulmonary artery. Contrast-enhanced chest computed tomography (CT) is a good diagnostic modality that shows a low-attenuation filling defect of the pulmonary artery in PAS patients. An 18-year-old man was referred to our hospital for the evaluation and management of cavitary pulmonary lesions that did not respond to treatment. A contrast-enhanced CT of the chest was performed, which showed a filling defect within the right interlobar pulmonary artery. The patient underwent a curative right pneumonectomy after confirmation of PAS. Although lung parenchymal lesions of PAS are generally nonspecific, it can be presented as cavities indicate pulmonary infarcts. Clinicians must consider the possibility of PAS as well as pulmonary thromboembolism in patients with pulmonary infarcts. So, we report the case with PAS that was diagnosed during the evaluation of cavitary pulmonary lesions and reviewed the literatures.
Jung, Hyun Jun,Moon, Jae Won,Song, Yooseob,Song, Daniel,Hong, Seong Kwang,Sung, Tae Hyun Institute of Pure and Applied Physics 2014 Japanese Journal of Applied Physics Vol. No.
<P> The purpose of this study is to design a piezoelectric energy harvester (PEH) that not only resists damage but also generates a higher power when impact is applied. To increase the generated power and durability a PEH, in this study, we investigated a new model and carried out numerical simulations of and experiments on the PEH. The numerical simulation results show that the stress distribution of the proposed PEH is more uniform than that of a conventional impact-type PEH. Thus, the proposed PEH decreases its possibility of being damaged. Experimental results for power under a matched impedance condition show that the maximum RMS powers of the conventional impact-type and proposed PEHs were 0.69mWat 16 kΩ and 3.97mW at 7 kΩ, respectively. Furthermore, the peak power of the proposed PEH was 518mW, which was 3,047% higher than that of the conventional impact-type PEH having a peak power of 17mW. </P>
30 Gbps High-Speed Characterization and Channel Performance of Coaxial Through Silicon Via
Jung, Daniel H.,Heegon Kim,Sukjin Kim,Kim, Jonghoon J.,Bumhee Bae,Jonghoon Kim,Jong-Min Yook,Jun-Chul Kim,Joungho Kim THE INSTITUTE OF ELECTRICAL ENGINEERS 2014 IEEE Microwave and Wireless Components Letters Vol. No.
<P>Coaxial through silicon via (TSV) technique allows reduction of high frequency loss due to conductivity in silicon substrate and flexibility in impedance by controlling the ratio of shield to center radii. For the first time, we measured and analyzed the high-speed channel performance of coaxial TSV. This letter presents the measurement results of the fabricated test vehicle in S-parameter and eye-diagram. The eye-diagram measurement results prove that coaxial TSV is capable of supporting signal transmission up to bit rate of 30 Gbps. The equivalent circuit model is suggested and experimentally verified by S-parameter comparison. Furthermore, the superiority of coaxial TSV over conventional TSV is confirmed by comparison of S-parameter results from equivalent circuit model simulation.</P>
Agricultural Commodity Programs in the United States: Reform, Reversal and WTO Implications
( Daniel A. Sumner ),( Jung Sup Choi ) 한국농촌경제연구원 2000 Journal of Rural Development Vol.23 No.2
American farm programs have gradually evolved over decades, and the FAIR Act continued the significant changes in form of the subsidy by reducing the effects on production. The large recent payments to U.S farmers continue to affect trade somewhat. But, these payments should not limit progress in the new WTO agricultural round if it focuses on border measures. For this WTO round, the U.S. could facilitate liberal trade by proposing the elimination of agricultural tariffs, export subsidies, and export taxes or embargoes. Limits on the use of anti-dumping duties or barriers to block import "surges," reform of rules related to countervailing duties, and keeping science-based Sanitary and Phytosanitary rules are also vital to facilitate progress in negotiations.
Through Silicon Via (TSV) Defect Modeling, Measurement, and Analysis
Jung, Daniel H.,Youngwoo Kim,Kim, Jonghoon J.,Heegon Kim,Sumin Choi,Yoon-Ho Song,Hyun-Cheol Bae,Kwang-Seong Choi,Piersanti, Stefano,de Paulis, Francesco,Orlandi, Antonio,Joungho Kim IEEE 2017 IEEE transactions on components, packaging, and ma Vol.7 No.1
<P>Through silicon via (TSV)-based 3-D integrated circuit has introduced the solution to limitlessly growing demand on high system bandwidth, low power consumption, and small form factor of electronic devices. As the system design aims for higher performance, the physical dimensions of the channels are continuously decreasing. With TSV diameter of less than 10 mu m and pitch of several tens of micrometers, the I/O count has increased up to the order of tens of thousands for wide bandwidth data transmission. However, without highly precise fabrication process, such small structures are susceptible to a variety of defects. For the first time, in this paper, we propose a noninvasive defect analysis method for high-speed TSV channel. With designed and fabricated test vehicles, the proposed method is demonstrated with S-parameter and time-domain reflectometry measurement results. In addition, we present equivalent circuit models of TSV daisy-chain structures, including the circuit components for open defect and short defect. With characterized dominant factors in each frequency range, S-11 is analyzed to distinguish and locate the defects by the amount of capacitance, resistance, and inductance that the signal experiences. S-parameter measurement sufficiently allows high-frequency defect analysis of TSV channel without destroying the test sample. We experimentally verified the accuracy of the suggested model by comparing the S-parameter results from circuit simulations and measurements. Finally, the model is modified to discuss the effects of open defect and short defect on the electrical characteristics of TSV channel.</P>